Sheet-metal-working machine.



J. P. WING.

SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909.

1 ,031,605. Patented July 2, 1912.

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APPLICATION FILED NOV. 5, 1909.

Patented July 2, 1912.

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J. F. WING.

SHEET METAL WORKING MACHINE.

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APPLICATION FILED NOV. 5, 1909.

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APPLICATION FILED NOV.5,1909.

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SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909.

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SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909 Patented July 2, 1912.

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APPLICATION FILED NOV. 5, 1909,

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APPLICATION FILED NOV. 5, 1909.

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SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909.

1 ,O31,605. Patented July 2, 1912.

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JOHN F. WING, OF MAYWOOD, ILLINOIS.

SHEET-METAL-WORKING MACHINE.

Application filed November 5, 1909.

Specification of Letters Patent.

Patented July 2, 1912.

Serial No. 526,456.

To all whom it may concern:

Be it known that I, JOHN F. WVING, a citizen of the United States, andresident of Maywood, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Sheet-Metal-WVorkingMachines, of which the following is a specification, and which areillustrated in the accompanying drawings, thereof.

The invention relates to machines for working sheet metal, andparticularly to those comprising punches and dies adapted toautomatically out and fold articles from blank sheets of tin-plate andsimilar materials.

The object of the invention is to simplify and improve the constructionof machines of this class; and the invention is exemplilied in themechanism hereinafter described and illustrated in the accompanyingdrawings, in which Figure 1 shows in side elevation a sheet metalworking machine embodying the invention; Figs. 2 and 3 are plan views ofthe same, Fig. 2 showing the forward end of the machine, and Fig. 3 itsrear end; Fig. 4 is an end elevation of the same; Fig. 5 is alongitudinal sectional view taken on the line 5 5 of Fig. 2; Fig. 6 is alongitudinal vertical sectional view taken on the line 66 of Fig. 3;Fig. 7 is a longitudinal vertical sectional view taken on the line 77 ofFig. 3; Figs. 8, 9 and 10 are detail sectional views, theplanes of thesections being indicated by the lines 8S, 9-9 and 10-10,

forming a part respectively, on Figs. 1 and 3; Fig. 11 is similar toFig. 10 but illustrates the parts in a different position of movement;Fig. 12 is a detail sectional view taken on the line 12 12 of Figs. 1and 3; Fig. 13 is a detail sectional view taken on the line 1313 ofFigs. 1, 2 and 5; Fig. 14 is a sectional view taken on the line let-14Lof Figs. 1 and 2; Fig. 15 shows the central portion of the machine inperspective; Fig. 16 is a detail sectional view illustrating a form offeed mechanism employed upon the machine; Figs. 17, 18 and 19 illustratea form of clutch employed upon the machine, Fig. 18 being a sectionalView taken on the line 18-18 of Fig. 17; Fig. 20 shows in perspective anelectrical switch employed upon the machine; Figs. 21 to 29, inclusive,illustrate the article produced by the machine in its several stages ofdevelopment; Fig. 30 shows the stock from which the articles areproduced; Fig. 31 is a detail sectional View taken on the line 3131 ofFig. 3; Fig. 32 is a perspective view of a form of frame which may beemployed for receiving articles produced in the machine; Figs. 33 and 34are perspective Views of certain dies shown in Fig. 6; and Figs. 35 and36 are perspective views of certain dies shown in Fig. 7.

The machine illustrated is of a form adapted to produce tin car sealslike that shown in Fig. 29 of the drawings, from blank sheets oftin-plate of rectangular shape. In the operation of the machine, aplurality of blanks, such, for example, as that shown at a in Fig. 21,and comprising a head 50 and a strap 51, are punched from a sheet of tinX, Fig. 30. These sheets of tin stock X are preferably of greater widththan the length of the blank a, the stock being operated uponprogressively from end to end, thus leaving a multilated sheetcomprising a plurality of straps 52, connected at one end by acontinuous band 53, which, upon being reversed, may be delivered to themachine a second time and a second series of blanks a punched therefrom,the straps 52 serving to form the straps 51 of the blanks and the heads50 of the blanks being punched from the continuous band 53.

The machine comprises a plurality of dies which operate upon the blank ain succession, and feed mechanisms for advancing the stock from whichthe blanks are punched and for advancing the blanks upon the s-everaldies and delivering them in the form of completed car seals at the endof the machine. The punch for cutting the blanks from the stock isgenerally designated in the drawings by the letter A. The several diesare generally designated by the letters 13, C, D, E, F, G, H and Irespectively. In Figs. 21 to 29 inclusive of the drawings, the result ofthe operation of the punch A and the several dies is illustrated, theblank cut by punch A being generally designated by the letter a asbefore described, and the form which this blank takes after itsmanipulation by each of the several dies B, C, D, E, F, G, H, and I,being shown at b, 0, cl, 6, f, g, h and 6 respectively. Apparatus fornumbering the finished seals is shown in 0utline at J.

The machine preferably comprises a table, generally designated by thenumeral 54. This table is supported in a horizontal position bystandards 55, 56 and 57, the standards, designated by the numerals 55and 56, being connected at the top by a bed plate 98 which extendsbeneath the table 54 adjacent one of its ends and serves for supportingthe punch A. The punch A is carried by a pair of uprights 62, 63, whichrise from the bed plate 98 at each side of the table 54, and areconnected at the top by a cross piece 97. The punch comprises avertically movable punch head 58 and a cotiperat-ing stationarydie-block 59, Figs. 4 and 5. The punch head 58 has a vertical slidingmovement between ways 60 and 61 provided upon the inner faces of thestandards 62, 63, these ways being of the form usually employed for thepunch heads of metal punching machines. A drive shaft 64 is journaled inthe standards 62, 63, above the punch head 58, and an eccentric 65,formed upon the drive shaft 64 between the standards 62, 63, isoperatively connected to the punch head 58 in the usual manner by meansof a link. A countershaft 94, jour naled in the uprights 62, 63 in rearof the drive shaft 64 and having gear connection 95, 96 therewith,whereby it turns at the same rate as the drive shaft but in the oppositedirection, serves for transmitting motion to certain other parts of themachine.

The die-block 59 is supported by the uprights 62, 63 above the table 54,the blanks a cut from the stock X by the movement of the punch head 58into the die-block 59 being delivered onto the table 54 through the dieaperture. For insuring the downward movement of the blanks a through thedieblock 59, a pair of electro-magnets 67, set into the table 54 throughthe bed plate 98, and having pole pieces located in l1ne with theaperture of the die-block 59, are preferably provided. As shown, theseelectromagnets are supported by a bracket- 68, secured to the undersideof the bed plate 98, and their coils are in circuit with a battery,diagrammatically represented at 69 (Fig. 4), and with a switch,generally designated by the numeral 70, controlled by the punch head.The switch 70 is shown in detail in Fig. 20 of the drawings. Itpreferably comprises a pair of insulated terminal blocks 71, 72, mountedon the standard 62, adja cent the punch head 58. One of the terminalblocks, as 71, is of T-shape, and the other terminal block 72 is atwo-part member comprising a base 73 fixed in position on the standard62, and an L-shaped contactpiece 74, adjustably secured in position bymeans of set-screws 75, which enter the baseblock 73 through a slottedaperture 76 in the longer leg of the L-shaped contact-piece 74. Abridge-piece 77 is carried by the punch head 58 for connecting theterminals 71, 72. As shown, this bridge-piece is of spring metal and offlattened U-shape, one of the arms 7 8 of the U being in continuoussliding contact with the widened T-head of the terminal block 71, andthe other arm 79 of the U being movable into and out of engagement withthe shorter leg of the adjustable L-shaped member 74 of the terminal 72by the movement of the punchhead.

A supplemental work-table 80 is provided for supporting the stock X asit is delivered to the punch A. As shown, this work-table is supportedat one of its ends by the table 54 to which it is secured by set screws99 (Fig. 5) and at the other end by a bracket 81 which rises from thebed-plate 98. The work-table carries feed mechanism generally designatedby the. numeral 82 for advancing the work upon 'the punch A. Themechanism 82 comprises a cross head which is mounted in slideways 83provided in the work-table 80, and carries a spring clamp 84 forgripping the work. A rack bar 85 is rigidly secured to the cross head ofthe feed mechanism, 82, and extends forwardly therefrom beneath the worktable 80. For moving the rack bar 85, a rock shaft 86 extendstransversely beneath the work table 80, and is journaled in bearingblocks 87, mounted on the bed plate 98. A crank arm 88, mounted on therock shaft 86, carries a spring pawl 89 adapted to operatively engagethe rack bar 85 when the rock shaft 86 turns in one direction. The rockshaft 86 is oscillated between each movement of the punch head 58. Forthis purpose, as shown, it is provided with a crank-arm 90, which isconnected by a link 91 with a crank pin 92, adjustably mounted in acrank disk 93 formed upon the end of the countershaft 94. ported overthe table 54 in rear of the dieblock 59 for receiving that which remainsof the stock, as the mutilated sheet illustrated in Fig. 30, after itpasses the punch A. The dies B, C, D, E, F, G, and H operate insuccession upon the head 50 of the blank a (Fig. 21). For that purposethey are preferably located along one side of the table 54 at differentdistances from the punch A, as most clearly shown in Figs. 1 and 15, andfeed mechanism having an intermittent movement is provided for causingthe blanks a to travel along the table in front of the dies. The die Ioperates upon the strap portion 51 of the blank a adjacent its outerend, and for that purpose it is A table 100 (Figs. 5 and 15) issupciprocation of the feed bars, and stops 117 preferably located uponthe other side of the table 54 from the dies just mentioned. As shown,it is located beyond the die H from the punch A.

The feed mechanism for moving the blanks a along the table 54 mostdesirably comprises a pair of reciprocating bars 101 and 102, mostclearly shown in Figs. 15 and 16. These bars preferably extend from apoint below the die-block 59 of the punch A where the blanks a cut bythe punch are received upon the table 54, to the rear end of the table54 (Fig. 3) beyond the die 1 and the numbering mechanism J, where theblanks a are discharged by gravity in the form of finished seals (Fig.29). As shown, the bars 101, 102 are embedded in the surface of thetable 54 by being laid into correspondingly formed grooves or slidewayswhich extend along the table from end to end. Each of the bars hasformed therein a longitudinal slot 103, and within this slot are mounteda plurality of spring pawls 104. The pawls 104 are mounted to swing in avertical plane, each of them, as shown, being pivoted upon a pin 105which is set transversely through the corresponding bar 101, 102, andcrosses the slot 103. The forward end of each pawl is urged upwardly toyieldingly project above the surface of the table 54, as by means of aspring 106, which reacts between the free end of the pawl and the floorof the slot 103. Preferably the pawls 104 are located at intervals alongthe bars 101, 102, corresponding to the distance through which theblanks a are to be moved along the table 54 upon each reare provided forpreventing a return movement of the blanks on the table. Forreciprocating the feed bars 101, 102, each is provided with a lug 107(Figs. 1 and 13) which extends below the table 54 through a slot 108. Arock shaft 109 extends transversely beneath the table 54 and is journaled in brackets 110 secured to the under side of the table. Thisrock shaft is preferably oscillated between each movement of the punchhead 58. For that purpose a crank arm 111, located at one side of thetable 54 and mounted upon the end of the rock shaft 109, is connected bya link 112 with a crank pin 113 adjustably mounted in a crank disk 114formed upon the end of the drive shaft 64. Crank arms, as 115, aremounted on the rock shaft 109 below the table 54 and in line with eachof the lugs 107. Each of these crank arms is operatively connected toone of the lugs 107 by an adjustable link 116.

The stops 117 for preventing backward movement of the blanks a on thetable 54 are preferably arranged in a double row and at intervalsthroughout the length of the table corresponding to the spacing of thepawls 104 carried by the feed bars 101,

102. Most desirably these stops are vertically movable, being raised bycontact therewith of the advancing blanks to permit the blanks to passbeneath them while they fall by gravity in rear of the blanks to preventbackward movement of them. As shown, two slightly different forms of thestops are employed upon the machine, the form illustrated in detail inFigs. 5, 15 and 16 being used throughout the greater portion of thelength of the table 54, while another form illustrated in Figs. 1 and 3is employed adjacent the rear end of the table 54 for controlling themovement of the blanks a as they pass the numbering mechanism J. Thefirst-mentioned form comprises a pair of bars 118, 119 which extend overthe table 54 from its forward end to a point just in front of thenumbering mechanism J. These bars are supported in a vertical plane bybrackets, as 120, 121 located at intervals along the table 54. The bars118, 119 are attached to these brackets in such a way as to permitvertical movement of the bars, as by means of bolts 122, which passthrough the bars and through vertically slotted apertures 123 in thebrackets. The Weight of the bars 118, 119 is received by the blanks aupon the table 54, and the stops 117 preferably take the form of gravitypawls 124 pivotally secured at one end to the corresponding bar, as 118,119, and having their free ends resting upon the table 54. Adjacent therear end of the table 54, the stops 117 take the form of shouldersformed upon bars 125, 126 (Figs. 1 and 3) which extend over the table 54and are supported for movement ina vertical plane, after the manner ofsupporting the bars 118, 119, by brackets, as 127, 128. In order toprovide space for the numbering dies J between the feed bars 101, 102,one of these bars, as 102, is offset adjacent its rear end, as shown at129, (Fig. 3). I

Pressure in addition to that placed upon the blanks a by the bars 118,119, and 125, 126, as the blanks move along the table, is applied atintervals by means of pressure bars 132, 133. These pressure bars, asshown, are attached to overhanging brackets 134, 135 by screw bolts 136which enter a slotted aperture 137 in the corresponding bracket. Theweight of the pressure bars 132, 133 is supplemented by means of springs138 which react between the bars adjacent each end and a cross arm 139carried by the brackets, as 134, 135. Guides 140 which, as shown, takethe form of angle irons applied to the surface of the table 54, extendalong the table adjacent its margins for engaging the ends of the blanksa. The brackets 134, 135 rise from the table 54 at a point outside ofthe guides 140. For supporting the dies B, C, D, E, F, G and H, a ledgeor flange 130 preferably extends along one side of the table 54throughout a portion of its length. As shown, the ledge or flange 130 ispermanently secured to the table 54 adjacent its edge, as by screw bolts131 (Fig. 8). The flange 130 also serves for supporting the brackets120, to which the bar 118 is attached. A cam shaft 141 extends alongsideof the table 54 for operating the dies B, C, D, E, F, G, H and I and thenumbering apparatus J. As shown, this cam shaft is jo-urnaled inbrackets 142 formed upon the flange plate 130, and it is rotated at thesame rate as the drive shaft 64, by being operatively connected to thecountershaft 94 through an intermediate vertical shaft 143 (Figs. 2 andwhich has bevel gear connection 144, 145 with the countershaft and thecam shaft.

The die B is a simple punch for punching an aperture in the blanks anadjacent the head 50, as shown at b, Fig. 22. It comprises avertically-movable punch-head 146 and a cotiperating apertured die plate147 '(Fig. 15). The punch head 146 is mounted in slideways 148 formedupon a bracket plate 149 secured to the flange plate 130, as by screwbolts 150, and the die plate 147 is mounted in the table 54 in such away thatthe blanks a are moved over it by the feed bars 101, 102 and thecoiiperating stops 117. For reciprocating the punch head 146 a lever 151is pivotally attached at 152 to the end of the flange plate 130 (Fig.2). This lever has a lug 153 formed upon one end. which enters a notch154 in the side face of the punch head 146. The other end of the lever151 carries a cam roller 155 which cooperates with a cam 156 (Fig: 13)mounted on the cam shaft 141. The cam roller 155 is held in cotiperatingrelation with the cam 156 by means of a spring 157 which bearsdownwardly on the lever 151, as by being coiled about a spindle 158having a yoke 159 at one end which is attached to the lever 151, andhaving its other end slidingly mounted in a bracket plate 160 secured tothe flange plate 130, as by a screw bolt 161. The spring 157 reactsbetween the under side of the bracket plate 160 and the yoke 159.

A feature of the seal illustrated in Fig. 29 of the drawings is a barbedtongue 162 inclosed within the head of the seal and formed upon the endof the blank a (Fig. 21). The function of the die C is to fold thetongue 162 to the position illustrated at 0, Fig. 23. To this end thedie C is preferably located beyond the die B from the punch A in aposition to engage the blank after it has been operated upon by thepunch B during its movement along the table 54. As most clearly shown,in Fig. 13 of the drawings, the die C comprises a stationary shoe oranvil 163, adjustably supported over the table 54, as by a bracket 164,secured to the 65 flange plate 130. Preferably the bracket 1.64 extendsbetween Ways 165 formed on the flange plate 130 and is secured inadjusted position by means of a clamping bolt 166 which enters theflange plate 130 through a vertically slotted opening 167 in thebracket.

The anvil 163 has a lateral projecting foot-piece 168, and the tongue162 is folded upwardly over the foot piece 168 by means of a die-finger169 which has in turn an upward and a forward movement through a slottedopening 170 in the table 54. As shown, the finger 169 is carried by arocking member 171, pivotally secured at 172 to lugs 173 formed upon thelower edge of the flange plate 130. The rocking member 171 carries acam-engaging roller 174, and this roller cotiperates with a cam 175mounted on the cam shaft 141 for raising the diefinger 169. Forpermitting the forward movement of the die-finger 169 it has a slidingconnection with the rocking member 171, as by means of bolts 176 whichenter the rocking member 171 through a slot 177 in the finger. Thefinger 169 is normally retracted by a spring 178 which reacts between abracket member 179 secured to one of the bearing blocks 142 of the camshaft 141 (Fig. 2), and a plunger rod 180 connected to the finger. A cam182 mounted on the cam shaft 141 serves for advancing the die finger169, as by engaging an upwardly projecting shoe or heel 181 formed uponthe finger at its rear end. Preferably the cams 17 5 and 182 are soproportioned and relatively disposed upon the cam shaft 141 that the 1 0forward end of the die finger 169 is raised by the cam 175 prior tobeing advanced by the cam 182 and is maintained in the ele-- vatedposition until the cam 182 has passed the shoe 181 and the finger hasbeen again 5 retracted by the spring 178. The die finger 169 thus servesto fold the tongue 162 over upon the projecting heel 168 of the anvil163, and by pressing it against the concave face 168 of the anvil, givesit the curved 1 0 form illustrated in Fig. 23. When the die finger hasbeen withdrawn from contact with the tongue, it is lowered tothe normalposition illustrated in Fig. 13, by a spring 232 V which bears upwardlyon the rear end of the 1 5 rocker member 171, as by being coiled about aplunger 233 pivotally connected to the rocker member and sliding throughabracket 234, the said spring reacting between the bracket and ashoulder 235 formed 120 on the plunger.

The function of the die D is to change the blank a from the flat formillustrated in Figs. 21, 22 and 23 of the drawings, to the form shown atd (Fig. 24), wherein the 125 widened portions 183 and 184 of the head 50of the blank are provided with complementary flanges capable of beinginterfolded to form the side seams 236, 237 of the head of the seal(Fig. 29). Preferably this die also 139 strikes a pocket 185 in the part183 of the blank (I. and depresses the tongue 162 from the inclinedposition shown at c in Fig. 23 to the position illustrated in Fig. 24.

As shown, the die D comprises a vertical movable punch head 186supported over the table 54 and a cotiperating die plate 187 embedded inthe table. These parts are most clearly illustrated in Figs. 14 and 15of the drawings. The blank (1. is moved over the die plate 187 duringits step by step advance along the table 54 after it passes the die C.The punch head 186 is preferably mounted for vertically sliding movementin slideways 188 formed in a bracket plate 189 which is permanentlysecured to the flange plate 130. The punch head 186 is operated from thecam shaft 141 through a lever 190. As shown, this lever has a roundedhead 191 which projects through a slotted open-- ing 192 in the flangeplate 130 into a pocket 193 provided in the punch head.

For pivotally supporting the lever 190, bearing blocks 194 are appliedto the outer face of the flange plate 130 and are adiustably securedthereon by means of screw bolts 195 and set screws 196. The set screws196 have a threaded bearing in an overhanging lip 197 provided upon theupper edge of the flange plate 130. and resist upward pressure on thebearing blocks 194. At the outer end of the lever 190 is mounted acam-engaging roller 198 which cotiperates with a cam 199 mounted on thecam shaft 141 for depress ing the punch head 186. For raising the punchhead 186 a spring 200 is preferably employed. As shown, this spring iscoiled about a rod 201 having its lower end connected to the lever190.while its upper end has a sliding bearing in a bracket arm 202secured to the flange plate 130 by a screw bolt 203. The spring 200reacts between the under side of the bracket arm 202 and a shoulder 204formed on the rod 201.

The punch head 186 and die plate 187 have complementary formed die facesand each is preferably also provided with spring-advanced strippers 205,206. the

former being designed to prevent the blank a from being raised from thetable 54 by the punch head 86 and the latter being adapted to raise theformed blank out of the depressions of the die plate 187 in order thatits movement along the table 54 upon the next advance of the feed bars101, 102 will not be interfered with.

The die E is most clearly illustrated in Figs. 6, 10 and 11 of thedrawings. The function of this die is to fold the outer por tion 184 ofthe head 50 of the blank a over upon the inner portion 183 in the mannershown at c, Fig. 25. Preferably this die is generally similar inconstruction to that designated C and heretofore described, the anvilmember about which the folding operation is performed being, however, inthis instance, a movable member in order that it may be entered betweenthe upstanding flanges formed on the portion 183 of the blank (1 by thedie D after the blank has been positioned in front of this die by themovement of the feed bars 101, 102.

As shown. the anvil about which the folding of the blank 12 isaccomplished by the die E takes the form of a hook-shaped member 207pivotally supported at its higher end from a bracket 208 secured to theinside face of the flange plate 130. The movement of the member 207 iscont-rolled by a cam 212 mounted on the cam shaft 141.

A jointed link 209 is pivotally connected to the member 207 at' 210 andextends outwardly through a slotted opening 211 in the flange plate 130to operatively engage this cam. Preferably the outer section 213 of thejointed link 209 is curved, and straddles the cam 212 to be movedthereby in opposite directions. As shown, cam-engaging rollers 214, 215are provided at the two ends of the curved section 213 of the link 209.These rollers are maintained in co6perative relation with the cam bymeans of a spring 216 which bears downwardly on the member 213. Mostconyeniently the spring 216 is coiled about a rod 217 which has asliding bearing in a bracket arm 218 carried by the flange plate 130 andis connected at its lower end to the member 213. A die finger 219 havingin turn an upward and a forward movement is employed for folding theparts of the blank (1 about the hooked end of the anvil member 207 whenthe latter has been advanced to the position shown by dotted lines inFig. 10. This die finger is similar in construction and operation to thedie finger 169 employed for folding the barbed tongue 162, and will notbe further described.

The die F is shown in detail in Figs. 6, 9, 33 and 34. The function ofthis die is to fold the upturned edges of the part 183 of the blank aover upon the side edges of the part 184 in the manner shown at f Fig.26, to form the side seams of the chambered head of the seal. To thisend the die F comprises yielding clamping members adapted to compressthe parts 183, 184, of the blank a together without the use ofsuiiicient force to distort them. and laterally movable die members forfolding in the upturned edges of the part 183.

As shown, the clamping members comprise a yielding base block 220 set inthe table 54 in such a position that the folded parts 183, 184, of theblank a are moved into register with it by the advance of the feed bars101, 102, after having passed the die E. The table 54 is provided withan aperture 221, Fig. 9, for receiving the block 220, and a bracketplate 222 is secured to

